a {
  margin: 0 10px;
}

a.active,
a.link-active {
  color: red;
  font-size: 30px;
}

a.about-active {
  color: orange;
  font-size: 20px;
}
.app h2 {
  font-size: 90px;
}
.top {
  font-size: 60px;
}